In view of the possibility of a squamous cell carcinoma metastatic to the thyroid, MR imaging of the neck was performed and revealed a 22-mm, cystic nodule in the right lobe of the thyroid, markedly hyperintense on T2-weighted sequences ( Fig 3 ) and slightly hyperintense on T1-weighted sequences ( Fig 4 ). (ajnr.org)

Common tumors seen in this space would include squamous cell cancer, lymphoma, and sometimes adenocarcinoma, adenoid cystic carcinoma, and juvenile angiofibromas. (scribd.com)

Neoplasms, such as metastatic squamous cell carcinoma to the submandibular lymph nodes or a salivary gland tumour, could create a similar appearance but rarely have such well defined borders and can usually be palpated in the floor of the mouth or submandibular triangle of the neck as a hard mass. (wikipedia.org)

The removed cyst must be evaluated by pathologist to confirm the diagnosis, and to rule out other neoplastic lesions with similar clinical or radiographic features (e.g., cystic or solid ameloblastoma, central mucoepidermoid carcinoma). (wikipedia.org)

Radiographically the cyst appears unilocular with well defined margins and often sclerotic borders but sometimes it may be multilocular in appearance and may also have a continuous cystic membrane. (wikipedia.org)

They occur when skin cells and things like hair, sweat glands, oil glands or fatty tissue get trapped in the skin as a baby grows in the womb.Dermoid cysts are present at birth (congenital) and are common. (wikipedia.org)

Dermoid cysts more often involve the lumbosacral region than the thoracic vertebrae and are extramedullary presenting in the first decade of life. (wikipedia.org)

Spinal abnormalities, e.g. intramedullary dermoid cysts may arise more frequently in the lumbosacral region (quite often at the level of the conus medullaris) and may be seen with other congenital anomalies of the spine including posterior spina bifida occulta as identified by the neuroradiological analysis. (wikipedia.org)

The Stafne defect also tends to not increase in size or change in radiographic appearance over time (hence the term "static bone cyst"), and this can be used to help confirm the diagnosis. (wikipedia.org)

It was previously known by many names, including static bone cyst, Stafne idiopathic bone cavity, and salivary gland inclusions in the mandible, An early case of Stafne's defect has been discovered in a 7th-century BC adult male individual from Klazomenai, one of the 12 cities of the Ionian League (now in modern Turkey). (wikipedia.org)

There is an inner lining of single flattened epithelial cells (simple squamous epithelium) composed of a type of epithelium that is called endothelium, and the cells are called endothelial cells. (wikipedia.org)

A and B, Axial ( A ) and coronal ( B ) unenhanced CT scans of the orbits show a well-defined water-density rounded lesion compatible with a cyst in the orbital floor abutting the inferior aspect of the globe and in continuity with the mid aspect of the lower eyelid ( arrows, A ). A pathologic specimen confirmed a simple ductal cyst of the accessory lacrimal glands. (ajnr.org)

The most common location of dentigerous cysts are the Mandibular 3rd Molars and the Maxillary Canines, and they rarely involve deciduous teeth and are occasionally associated with odontomas. (wikipedia.org)

pathological findings such as thymic cysts are also known to have increased uptake. (hindawi.com)

Given that pulmonary metastases of differentiated thyroid cancer are rare, thymic cysts, though also rare, must be part of the differential diagnosis for false positive findings on an I-131 survey. (hindawi.com)

Ovulation is accepted as the cause of ovarian cortical inclusion cysts, the precursor lesions of serous carcinomas, and lower numbers of these cortical inclusion cysts are thought to be the mechanism by which reducing lifetime ovulations can lower the risk of developing HGSC. (wikipedia.org)

While until recently HGSC was thought to arise from simple differentiation of cortical inclusion cysts (CICs) of ovarian surface epithelium (OSE), the cell origin of HGSC is now understood to be much more complex, with evidence for other sites of origin, both intra- and extra-ovarian, having come to light. (wikipedia.org)

We report an eight years female child of symptomatic giant Rathke's cleft cyst extending from right parasellar, paraventricular region to right fronto-temporo-parietal cortical surface which is an unusual site for Rathke's cyst. (pubmedcentralcanada.ca)

however, cysts with histologic features of branchial cysts have been reported in unusual locations, such as the thymus, oral cavity (1) , parotid gland (2) , pancreas (3, 4) , and thyroid (5-11) . (ajnr.org)

In some cases, a powerful 3T (Tesla) MRI scanner can help define the location of critical brain structures affected by the tumor.The histologic pattern consists of nesting of squamous epithelium bordered by radially arranged cells. (wikipedia.org)

Histologic examination revealed a cyst lined by a layer of cuboidal epithelium surrounded by a layer of spindled myoepithelial cells. (ajnr.org)

Obstruction of the excretory duct of any lacrimal gland results in the entity called dacryops, or simple ductal cyst. (ajnr.org)

The duct persists as a midline structure forming an open connection between the back of the tongue and the thyroid gland.This opening can lead to fluid accumulation and infection, which necessitate the removal of the duct. (wikipedia.org)

However, the continued presence of the duct can often lead to complications due to infections and fluid buildup. (wikipedia.org)

The glands in the mucosa of the duct will continue their secretions until the fluid forms a cyst or exit the duct via the opening in the foramen cecum. (wikipedia.org)

Local infections, such as colds, tonsillitis, or inflammation of the lymph nodes in the area can also lead to the accumulation of fluid within the duct. (wikipedia.org)

In addition to the developmental origin, some authors have suggested that periapical inflammation of non-vital deciduous teeth in proximity to the follicles of unerupted permanent successors may be a factor for triggering this type of cyst formation. (wikipedia.org)

Till now, only 155 cases of symptomatic Rathke's cleft cyst have been reported, of which 11 cases are suprasellar Rathke's cleft cyst with normal sella, but cases of parasellar, paraventricular Rathke's cleft cyst are distinctly uncommon and we have not found it reported in literature yet. (pubmedcentralcanada.ca)

There are cysts, e.g. buccal bifurcation cyst with self-resolation nature, in which close observation can be employed unless the cyst is infected and symptomatic. (wikipedia.org)

The lymphatic circulation begins with blind ending (closed at one end) highly permeable superficial lymph capillaries, formed by endothelial cells with button-like junctions between them that allow fluid to pass through them when the interstitial pressure is sufficiently high. (wikipedia.org)

Branchial cleft cysts are remnants of embryonic development and result from a failure of obliteration of one of the branchial clefts, which are homologous to the structures in fish that develop into gills. (wikipedia.org)